pgsql: Fix typo in tts_virtual_copyslot.

Fix typo in tts_virtual_copyslot.

The code used the destination slot's natts where it intended to
use the source slot's natts. Adding an Assert shows that there
is no case in "make check-world" where these counts are different,
so maybe this is a harmless bug, but it's still a bug.

Takayuki Tsunakawa

Discussion: /messages/by-id/0A3221C70F24FB45833433255569204D1FD34C0E@G01JPEXMBYT05

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/308813846e737f7d92ffb4e033d65e3df6cbddba

Modified Files
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src/backend/executor/execTuples.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)